Four states by statute allow hunters to retrieve dogs: Louisiana, Michigan, Minnesota, and Virginia.
Four states by statute allow hunters to retrieve wounded animals: Iowa, Kansas, Minnesota, and North Dakota.
Kansas:
K.S.A. 21-3728. Criminal hunting is hunting, shooting, trapping, pursuing any bird or animal, or fishing: (1) upon any land or non-navigable body of water of another, without having first obtained permission of the owner or person in possession of such premises; or (2) upon or from any public road, public right-of-way or railroad right-of-way that adjoins occupied or improved premises, without having first obtained permission of the owner or person in possession of such premises. … A person licensed to hunt and following or pursuing a wounded game bird or animal upon any land of another without permission of the landowner or person in lawful possession thereof shall not be deemed to be in violation of this provision while in such pursuit.
32-1013. Taking wildlife without permission on land posted "by written permission only". (a) Any landowner or person in lawful possession of any land may post such land with signs stating that hunting, trapping or fishing on such land shall be by written permission only. It is unlawful for any person to take wildlife on land which is posted as provided in this subsection, without having in the person’s possession the written permission of the owner or person in lawful possession thereof. … (c) A person licensed to hunt or fur harvest who is following or pursuing a wounded animal on land as provided in this section posted without written permission of the landowner or person in lawful possession thereof shall not be in violation of this section while in such pursuit, except that the provisions of this subsection shall not authorize a person to remain on such land if instructed to leave by the owner or person in lawful possession of the land. Any person who fails to leave such land when instructed is subject to the provisions of K.S.A. 21-3721 and 21-3728, and amendments thereto.
32-1013. (a) Any landowner or person in lawful possession of any land may post such land with signs stating that hunting, trapping or fishing on such land shall be by written permission only. … (b) Instead of posting land as provided in subsection (a), any landowner or person in lawful possession of any land may post such land by placing identifying purple paint marks on trees or posts around the area to be posted. Each paint mark shall be a vertical line of at least eight inches in length and the bottom of the mark shall be no less than three feet nor more than five feet high. Such paint marks shall be readily visible to any person approaching the land. Land posted as provided in this subsection shall be considered to be posted by written permission only as provided in subsection (a).
Iowa:
I.C.A. 716.7. "Trespass" means entering property without the express permission of the owner, lessee, or person in lawful possession, with the intent to commit a public offense, to use, remove therefrom, alter, damage, harass, or place anything animate or inanimate, or to hunt, fish or trap on the property. This paragraph does not prohibit the unarmed pursuit of game or fur-bearing animals lawfully injured or killed which come to rest on or escape to the property of another.
Louisiana:
RS 14:63. B. No person shall intentionally enter immovable property owned by another: (1)When he knows his entry is unauthorized, or (2)Under circumstances where he reasonably should know his entry is unauthorized. C.(1)It shall be an affirmative defense to a prosecution pursuant to Subsection (B)(2) that the person was unarmed and entered immovable property for the sole purpose of retrieving a dog or livestock. (2)It shall be an affirmative defense to a prosecution pursuant to Subsection (B)(2) to show that property was not adequately posted in accordance with Subsections D, or E, and F of this Section…
RS 14:63. D. In order for forest land to be adequately posted the owner, lessee, or person having the written permission of the owner of lessee shall post the property by any one of the following methods: (1) placing identifying paint marks on trees of posts around the area to be posted. Each paint mark shall be a vertical line of at least eight inches in length, and the bottom of the mark shall be no less than three feet nor more than five feet high. Such paint marks shall be placed no more than one hundred feet apart and shall be readily visible to any person approaching the property. (2) Placing signs around the area to be posted at no more than one hundred feet apart and at normal points of ingress and egress. The signs shall bear the words "Posted", "No Trespassing", or "No" in letters at least three and one-half inches high and shall be so placed as to be readily visible to any person approaching the property.(3) Constructing a fence around the area to be posted of not less than three strand wire, or its equivalent, and placing signs that bear the words "Posted", "No Trespassing", or "No" in letters at least three and one-half inches high at normal points of ingress and egress. The type of color of the paint to be used for posting shall be prescribed by regulation by the Louisiana Forestry Commission, which shall not select a color that is presently being used by the timber industry in this state to mark land line or property lines. The color of paint prescribed shall not be used on trees or posts for any other purpose.
Minnesota:
M.S.A. 97B.001 Subd. 2. Permission required to enter agricultural land for outdoor recreation purposes. Except as provided in subdivisions 5 and 6, a person may not enter agricultural land for outdoor recreation purposes, without first obtaining permission of the owner, occupant, or lessee. Subd. 3. Remaining on land prohibited after notice. Except as provided in subdivision 6, a person may not remain on any land for outdoor recreation purposes after being orally told not to do so by the owner, occupant, or lessee. Subd. 4. Entering posted land prohibited; signs. (a) Except as provided in subdivision 6, a person may not enter, for outdoor recreation purposes, any land that is posted under this subdivision without first obtaining permission of the owner, occupant, or lessee. Subd. 5. Except as provided in subdivision 3, a person on foot may, without permission of the owner, occupant, or lessee, enter land that is not posted under subdivision 4, to retrieve a wounded animal that was lawfully shot. The hunter must leave the land immediately after retrieving the wounded game. Subd. 6. A person on foot may, without permission of the owner, occupant, or lessee, enter private land without a firearm to retrieve a hunting dog. After retrieving the dog, the person must immediately leave the premises.
97B.001 Subd. 4. Entering posted land prohibited; signs. (b) the owner, occupant, or lessee of private land, or an authorized manager of public land may prohibit outdoor recreation on the land by posting signs once each year that: (1) state "no trespassing" or similar terms; (2) display letters at least two inches high; (3) either: (I) are signed by the owner, occupant, lessee, or authorized manager; or (ii) include the legible name and telephone number of the owner, occupant, lessee, or authorized manager; and (4) either: (I) are at intervals of 1,000 feet or less along the boundary of the area, or in a wooded area where boundary lines are not clear, at intervals of 500 feet or less; or (ii) mark the primary corners of each parcel of land and access roads and trails at the point of entrance to each parcel of land except that corners only accessible through agricultural land need not be posted.
North Dakota:
N.D.S.L. 20.1-01-18. Hunting on posted land and trapping on private land without permission unlawful – Penalty. No person may hunt or pursue game, or enter for those purposes, upon legally posted land belonging to another without first obtaining the permission of the person legally entitled to grant the same. No person may enter upon privately owned land for the purpose of trapping protected fur-bearing animals without first gaining the written permission of the owner or operator of that land. 20.1-01-19. When posted land may be entered. Any person may enter upon legally posted land to recover game shot or killed on land where he had a lawful right to hunt.
20.1-01-17. Posting of lands by owner or tenant to prohibit hunting – How posted – Signs defaced. Only the owner or tenant of any land may post it by placing signs alongside the public highway or the land giving notice that no hunting is permitted on the land. The name of the person posting the land must appear on each side in legible characters. The signs must be readable from the outside of the land and must be placed conspicuously not more than eight hundred eighty yards [804.68 meters] apart. As to land entirely enclosed by a fence or other enclosure, posting of signs at or on all gates through the fence or enclosure constitutes a posting of all the enclosed land.
Virginia:
C.V. 18.2-132. Trespass by hunters and fishers. Any person who goes on the lands, waters, ponds, boats or blinds of another to hunt, fish or trap without the consent of the landowner or his agent shall be deemed guilty of a class 3 misdemeanor.
18.2-133. Refusal of person on land, etc., of another to identify himself. Any person who goes on the lands, waters, ponds, boats or blinds of another to hunt, fish, or trap and willfully refuses to identify himself when requested by the landowner or his agent so to do shall be deemed guilty of a Class 4 misdemeanor.
18.2-134. Trespass on posted property. Any person who goes on the lands, waters, ponds, boats or blinds of another, which have been posted in accordance with the provisions of § 18.2-134.1, to hunt, fish or trap except with the written consent of or in the presence of the owner or his agent shall be guilty of a Class 1 misdemeanor.
18.2-136. Right of certain hunters to go on lands of another; carrying firearms or bows and arrows prohibited. Fox hunters and coon hunters, when the chase begins on other lands, may follow their dogs on prohibited lands, and hunters of all other game, when the chase begins on others lands, may go upon prohibited lands to retrieve their dogs, but may not carry firearms or bows and arrows on their persons or hunt any game while thereon. The use of vehicles to retrieve dogs on prohibited lands shall be allowed only with the permission of the landowner or his agent.
Section 18.2-134.1. Method of posting land. (A) The owner or lessee of property described in § 18.2-134 may post property by (I) placing signs prohibiting hunting, fishing or trapping where they may reasonably be seen; or (ii) placing identifying paint marks on trees or posts at each road entrance and adjacent to public roadways and public waterways adjoining the property. Each paint mark shall be a vertical line of at least two inches in width and at least eight inches in length and the center of the mark shall be not less than three feet nor more than six feet from the ground or normal water surface. Such paint marks shall be readily visible to any person approaching the property.
(B) The type and color of the paint to be used for posting shall be prescribed by the Department of Game and Inland Fisheries.
Michigan:
MCL 324.73102. (1) Except as provided in subsection (4), a person shall not enter or remain upon the property of another person, other than farm property or a wooded area connected to farm property, to engage in any recreational activity or trapping on that property without the consent of the owner or his or her lessee or agent, if either of the following circumstances exists: (a) The property is fenced or enclosed and is maintained in such a manner as to exclude intruders. (b) The property is posted in a conspicuous manner against entry.
(2) Except as provided in subsection (4), a person shall not enter or remain upon farm property or a wooded area connected to farm property for any recreational activity or trapping without the consent of the owner or his or her lessee or agent, whether or not the farm property or wooded area connected to farm property is fenced, enclosed, or posted.
(3) On fenced or posted property or farm property, a fisherman wading or floating a navigable public stream may, without written or oral consent, enter upon property within the clearly defined banks of the stream or, without damaging farm products, walk a route as closely proximate to the clearly defined bank as possible when necessary to avoid a natural or artificial hazard or obstruction, including, but not limited to, a dam, deep hole, or a fence or other exercise of ownership by the riparian owner.
(4) A person other than a person possessing a firearm may, unless previously prohibited in writing or orally by the property owner or his or her lessee or agent, enter on foot upon the property of another person for the sole purpose of retrieving a hunting dog. The person shall not remain on the property beyond the reasonable time necessary to retrieve the dog. In an action under section 73109 or 73110, the burden of showing that the property owner or his or her lessee or agent previously prohibited entry under this subsection is on the plaintiff or prosecuting attorney, respectively. (5) Consent to enter or remain upon the property of another person pursuant to this section may be given orally or in writing. The consent may establish conditions for entering or remaining upon that property. Unless prohibited in the written consent, a written consent may be amended or revoked orally. If the owner or his or her lessee or agent requires all persons entering or remaining upon the property to have written consent, the presence of the person on the property without written consent is prima facie evidence of unlawful entry.
MCL 324.73102. (1) (b) The property is posted in a conspicuous manner against entry. The minimum letter height on the posting signs shall be 1 inch. Each posting sign shall be not less than 50 square inches, and the signs shall be spaces to enable a person to observe not less than 1 sign at any point of entry upon the property.