We have been giving our Cody Sentinel for close to a year and he weighs about 2.9 pounds. He seems to be tolerating it well, but if you are concerned because your puppy is under 2 pounds, I would call the vet.
Another alternative to Sentinel is Revolution which is a topical.
Last edited by YorkieMomNYC; 07-24-2014 at 06:28 PM.
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