Goat housing has always been an interesting subject.
I have approx 35 goats of which 8 are males. The boys are housed in 2 lots of 3 and a pair of youngsters * horse looseboxes with small courtyards in front. The girls are housed inside an american barn system - all stables are inside one building - with the milkers in one area that is 16' x20' and the goatlings in a 16 x10.
The floor is concrete but as we use miscanthus bedding, it is allwed to build up a bit in the winter so it stays warm and in fact to a degree is self drying underneath!!
When the cold really sets in, all the goats have their own individual rugs - includes the boys as well - and I find they stay very well on this regime. The pregnant ones have the rugs checked weekly and the surcingles are let out accordingly !!
I make these rugs to order - check them out on my website,
www.martins-park.com ,
Everybody has their own ideas for housing, but very often you have to adapt what you have got.