I've been a vet tech for 10 yrs DON'T put pour on on your dogs. Some people use oral ivomec on their dogs but if you look at the dose for cattle it is in mg the dose for dogs is in mcg they say to dilute it but it is oil based and you will have a tough time making sure you have an even dose every time. I'm all for cutting cost but to save 5 bucks a month it's not worth any of my dogs lives. If you give too much it they get neurologic and die.
I have used it for years,,started when my dogs got rabbit fur mite mange,,it works for what I needed it for.I know others that have used it for years without any problems,it does do wonders for ear mites..infact was recommend to me by my vet when they got the rabbit mange.