Hi Ingrid,
your work is very nice. I'm a dog show photographer so I say that with some experience.

I disagree slightly with Jeff's advice about camera position: I find that getting slightly lower than the dog produces the best angle and head perspective. I agree with his comment about using flash to get catch-lights in the dog's eyes when you're doing portraits. The on-camera flash works fine for this.

As a Rottie owner, I've shot a lot of Schutzhund Trials. I try to focus on the release rather than the bite because of people's sensitivity to Rotties as "attack" dogs. Just something to consider if you intend to publish any of your work. And, yes, the action is when the dog latches onto the sleeve. That's why I don't shoot Schutzhund any more.

Nice work. I'd like to see more.

Jim Garvie