BN: If your SH uses his patio as a permanent dog run and won't walk the dogs outside, and if the sight and odor of training pads and cleaners + listening to the SH training the dogs is disturbing neighbors, I suggest you ask your coop lawyer what to do. These acts are, from what you say, obviously preventing the SH's neighbors from being able to enjoy their apts which would be a breach of the Proprietary Lease.

Also, although none of your other current SHs let dogs use their patios in this way, maybe your board should enact a policy or add terms to the House Rules that clearly outline what is and isn't permitted re: the maintenance of dogs (or other pets) within the building so this type of issue can be avoided in future with other SHs.