For standard sized chickens, you should have about 4 sqft per bird inside the coop and about 1 linear foot of perch...
So for 23 birds you need about 100 sqft of coop/house space, as said if you have stuff like nest boxes taking up floor space that space is not counted in the total... This means a 10x10, 12x8 or similar sized coop would be ideal, and you would need about 23 linear feet of perch or roughly three 8 foot long perches...
As for the run it should be about 10 sqft per bird, so in your case about 230 sqft or say a 10x25, 12x20, 15x15... If the coop is in the run you don't count that area unless the coop is elevated and the chickens can use the area under it as part of the run...
As for the coop being covered in 'caked' poop, that is poor husbandry and care by the previous owners, that should all be removed ASAP... You will always have poop in a coop, but it should never be cake up or piled up...
So for 23 birds you need about 100 sqft of coop/house space, as said if you have stuff like nest boxes taking up floor space that space is not counted in the total... This means a 10x10, 12x8 or similar sized coop would be ideal, and you would need about 23 linear feet of perch or roughly three 8 foot long perches...
As for the run it should be about 10 sqft per bird, so in your case about 230 sqft or say a 10x25, 12x20, 15x15... If the coop is in the run you don't count that area unless the coop is elevated and the chickens can use the area under it as part of the run...
As for the coop being covered in 'caked' poop, that is poor husbandry and care by the previous owners, that should all be removed ASAP... You will always have poop in a coop, but it should never be cake up or piled up...