No, it is not recommended to use flea collars designed for adult cats or dogs on kittens. Flea collars contain chemical ingredients that are formulated for larger animals and may be too strong or toxic for young kittens.
Additionally, kittens have a higher sensitivity to certain chemicals, and the use of inappropriate flea collars can lead to adverse reactions or even pose a health risk. It is best to consult with a veterinarian for safe and appropriate flea control options for kittens. They can recommend suitable topical treatments or oral medications that are specifically designed for kittens and provide effective protection against fleas and other parasites.