Could a flea collar be poisoning my cat? He's vomiting and quiet.

In my opinion flea collars are not a good idea any more (except the seresto collar) as they usually contain carbamates which are liver toxic. It would be better to use a spot on, for example. Here are some products: Spot-ons and/or chews Advantage, Advantix Advantage Multi (Advocate in the UK) Frontline (ticks as well) Bravecto spot on (ticks as well) - for cats, in tablet form for dogs Simparica, Nexgard Revolution (stronghold in the UK) Tablets: comfortis (will only kill fleas once) Collar: Seresto (ticks as well)

Fleas are never a fun surprise! Indoor cats can acquire fleas if they come inside on your clothing, through open windows, or on other pets in the household. Even though you have removed all of the adult fleas on Daisy, those adults have likely already laid eggs that will be impossible to remove. Flea collars (with the exception of the Seresto collar) tend to be very ineffective. It is possible that the collar may be affecting her negatively. Since Daisy has been relatively lethargic since you put the collar on, consider taking the collar off and using a high quality flea preventative medication, such as Advantage, Bravecto, or Revolution. Be sure to use one of these preventatives regularly for at least the next few months to break the fleas' life cycle, but preferably year-round. Cats can acquire tapeworms by eating fleas infected with tapeworms, so it may be worth taking a stool sample to Daisy's vet. If Daisy remains lethargic, stops eating and drinking, or develops any vomiting or diarrhea, she will certainly need to go to her vet for further evaluation. I hope that all goes well!

I'm sorry to hear you've had trouble finding an effective flea med! Most over-the-counter options are not very effective in my experience, including Advantage - although it's probably the best of the currently available OTC options! Flea collars do not work well, and can often be toxic to cats. Instead, I would recommend getting a prescription flea medication like Revolution or Bravecto from your veterinarian. This will be safe for your kitty, and much more effective. If it's been at least 1-2 weeks since you applied the Advantage, it should be safe to go ahead and use a new medication from your vet.

It could be the flea collar, as this frothing at the mouth can be a sign of flea treatment toxicity. Take the collar off Molly. Wait a few days, and apply a spot on treatment like Revolution or Advantage.

Side effects of the collar may include the symptoms you described. Remove the collar for 24-48 hours to and see if Brewer improves. If not, have him examined by your veterinarian to diagnose illness or injury.

Flea collars can cause reactions in cats, as they are exquisitely sensitive to flea medication. Given that Blue has wounds, I think an oral flea treatment would be best for her. I recommend Bravecto. You can get it from the vet. Keep in mind that fleas live in the environment, not on the animal, so you will have to treat the home as well. Wash their bedding in hot soapy water, and vacuum the furniture and carpet surfaces. You can use a spray to kill fleas in the house, such as Indorex, or a flea bomb would work well to kill the fleas in the home. Best of luck, I hope this helps!

If your cats are showing signs of poisoning, this is a medical emergency and they need veterinary treatment now. There is nothing you can do at home for them, as cats are very sensitive to flea treatments and any time they show signs of poisoning, veterinary treatment should be sought right away. Please take them into an ER vet clinic; if there isn't one in your area, there will be a vet on call for emergencies. The information to reach that vet is found on a clinic's answering machine or website.