Irulan,
You're a sensible person and ride a mountain bike. Your concerns are valid. I took no offence.
If we did the MTB thing, Monty wouldn't be invited. Far too much probablity of launching the poor little guy to the top of a tree. We tend to the straight, level and slow. I think we'll all be OK.
Monty is only the second dog I've ever had that I've wanted to take biking with me. The rest, for one reason or another were just not suitable, so they stayed home. It's a personality (dogiality?) thing.
Give big space to the festive dog that make sport in the roadway. Avoid entanglement with your wheel spoke.
(Sign in Japan)
1978 Raleigh Gran Prix
2003 EZ Sport AX