I was given advantage to try to my 11 week old puppy, and I am suspicious he will wash it off because he can't resisit playing in the pool, especially when its hot outside. From what i read, and was told at the vets office, he cannot get wet for 4 days after treatment. Also, it does not do anything for tics.

I use Ivomec on my adults, and have so for many years.

What about Trifexix? is that save for breeding dogs & puppies?

or the traditional heartgard plus for puppies

any advise is greatly appreciated,

Using Ivomec for puppies here.

is there a specific ivomec for puppies

No. You need to adjust the amount for the weights.