There are a variety of ear cleaning products available, as well. You squirt it in the animals ears, and rub the ears. You can use a paper towel, and really get the gunk out. It really depends on the animals tolerance for such things. My dog was pretty used to having stuff done to her. She even donated blood occasionally…. If we didn’t have any available. We usually had several bags, in our facility. But sometimes, there were shortages, and techs would bring their own animals in, to donate.
We actually had 3 cats, that lived in the hospital, just for transfusions. Sadly, one of them just died under anesthesia once, during the process. I remember the day vividly. I wasn’t there. I was at a bar watching football. Adrian Peterson broke the single game rushing record, against the Chargers. I got a phone call from work, and another tech told me that Louise, had died donating blood. I left, and went home. I collapsed in the kitchen, and just started crying. My dog Wanda came running in, and stepped on my balls, and busted my mouth open with her head…
My lip bled for hours… My balls hurt for days…