I haven't read all the responses in full - I skimmed them and there seemed to be a lot of different ideas, so I just thought I would post with my own experience in case it is of any use. My mare that I owned for 30 years was 3/4 TB and I assume something like Connie as there was definitely pony in her and she came from Ireland. Anyway, for the first 12 years I had her, and more so in her earlier days, I struggled to keep the weight on her over winter. Looking back I think she just worried it off. Once she moved to the last livery yard I had her on, for the last 18 years of her life, and with a good friend as YO, we never had a problem again. In fact we had to watch her weight in the summer. If Ludo is a sensitive soul, he may just be a bit worried about the whole situation with Deza. If all the physical tests and processes prove nothing, that might be something to think about.