the Ledger Enquirer has a reprint of Byran Brasher's article in the Memphis Commercial Appeal on hunting dog first aid. It's a pretty good read.

Old wash cloths for washing big areas

Hydrogen peroxide to induce vomiting in case of accidental poisoning

Commercial ice packs like the ones used to treat sports injuries

Kaopectate liquid to treat diarrhea

Benadryl (give 1-2 mg per pound every eight hours to treat bee stings or bug bites or 4 mg per pound for snakebites).

Buffered aspirin (give 5 mg very 12 hours for pain). Make sure the pill does not contain caffeine or other additives. Give with food.

Dramamine (give 25-50 mg one hour before traveling to prevent motion sickness). Try at home first.

Do not give Tylenol or Ibuprofen to any dog under any circumstances.

Add to the list of supplies at the end of the story, these from the story itself
Duct tape for temporary bandages
Rolled up newspaper for splint injured limbs
Super glue for temporary suturing
Source FEMA