I took my Yorkie to the parlour for a wash the other day, and the lady working there told me Tyson (my 4month old Yorkie) has ear infection. I had no idea, I also thought Tyson had fleas due to all the scratching behind the ears. So I went to the vet and they gave me ear cream I had to put inside the ears (not so easy,but I have mastered it

) The only problem is, how do I know if the infection is 100% cured? the lady said that if not treated right the first time, just like urinal infection it could keep coming back!

help!!