Err - I like the bags to be thick as I don't like the feel of poop in my hand - Yuck and sometimes when I walk the dog it could be some time before I get to a bin.
Jj, tske a doggy bag and a piece of kitchen roll. Put the kitchen roll on your hand and then the doggy bag. I use biodegradable bags from Jolley's pet dhop.
Your dogs are smaller than ours and we just use doggy bags from any pet store, I agree they need to be strong, nothing quite like poking your finger through a thin plastic back.