What Age Should A Kitten Wear A Cat Collar. Symptoms of pyrethrin toxicity in cats may include diarrhea, vomiting, drooling, lethargy, dilated pupils, seizures, slowed heart rate, and abnormal blood pressure. If your kitten is older than 12 weeks, you can use a flea collar but you need to exercise caution.
It could harm your cat if. Initially only put the collar on for a maximum of an hour at a time. If your kitten is older than 12 weeks, you can use a flea collar but you need to exercise caution.