Hannah, you twerp. You must be related to Betsy. I put some vet wrap on Betsy's happy tail yesterday--because I'm sick of cleaning blood spots off every available surface--and then went to the basement. Five minutes later, the vet wrap was gone, and I had to get the peroxide out.
She got roughly 1 tsp ( 1 cap) and then another of the same 5 minutes later
There was no time for being nice. I pried open her mouth, pointed that needle nose in the air and poured. Then I stroked her throat till she swallowed.
The gagging commenced almost immediately
You can use up to 1 teaspoon for each 10 pounds of body weight, at least according to Petplace.com on Inducing Vomiting. I can't bring myself to use that much, but the less I use, the more likely it is that I have to do it again. I keep a squeeze bottle (from CHX Rinse (doggy mouthwash)) with the peroxide.
Thanks for the tip re bubbling; I hadn't heard that.
Another tip from Petplace.com: use the 3% solution, not the hair strength stuff.