It is suspected that cats may be more likely to develop permethrin toxicity because they have different liver metabolic pathways to other species â in particular, they have a deficiency in the enzyme hepatic glucuronosyl transferase. Source(s): http://www.fabcats.org/owners/poisons/pe...
Re: Swallowed chunk of rawhide. In all honesty you need to contact your vet. Rawhides do cause blockages, especially in smaller dogs, because the pieces are too large to pass through the intestine. Contact your vet, and ask for some x rays. Cheapest, and most effiecient way to see if there is a blockage, how large the piece is, and if it is moving through.
See also our guide to canine bowel incontinence if your dog is suffering from these types of issues as well. Symptoms: A dog bowel obstruction may occur in any part of the gastrointestinal tract; therefore, clinical symptoms are also different for different locations. Obstruction in the small intestine is usually characterized by lethargy, anorexia, abdominal pain, vomiting and diarrhea.