Judy from Cookeville Tn writes
I needed the collar to be longer my small dogs have thick necks the place that I bought it said they were the same and same price so I bought large so I could trim them. now i'm concerned the medicine strength may be too much for the small dog.
Seresto Dog Flea and Tick Collar contains the same percentage of active in the sizes, you would just choose the size that best fits your pets neck. It would not harm your small dog if you use the larger collar. You would just have to cut more off to fit down to size.
Answer last updated on: 03/29/2022
