
Wow, I'd thought I was a wimp that up until January last year I'd never dared take a dogs temperature, i.e. in 20 or so years of owning dogs. However, as I thought I was alone in my worries, got my vet to demonstrate (she did say keep it pressed lightly to the side), and have not had any problems, touch wood.
Found it an absolute boon when Lil was expecting, as taking temperature twice a day did give me a very good idea when the action was going to start - rather than worrying for a week as I'd done with the previous litter. Have also found it very useful since, if I'm not sure whether a dog is 'off colour'.
Digital vs. mercury? - digital's easier, but I found the one I had inaccurate, and my vet agreed, so I've stuck to the mercury.
M.