In reply to Wildnorthmark:
I don't think it's quite right to say dogs aren't welcome in huts
Club huts will normally list it in the details of the hut, MS affiliated club huts can befound here
https://www.mountaineering.scot/huts
Bothies are normally fine for dogs, any exceptions tend to be more due to the estate not wanting poorly behaved dogs terrorising the local wildlife! Again, any restrictions are typically noted in the details of the bothy notes.
https://www.mountainbothies.org.uk/bothies/location-map/
Normal proviso for dogs in shared areas apply.
Enjoy!
Stu