With two Newfoundlands (both in the 135 pound vicinity) and a Lab (also ... errr ... well fed ... burp...) we decided it would just be too tight in a 25'. You might be able to work it out, but for doing months at a time it would get old pretty quick.
After my condo association made a new rule that kicked my Interstate out of the parking lot, I sold my beloved townhome and bought a house so that the Interstate could be home with me. I could not stand being parted from her.
p.s. the dog got her very own fenced yard out of the deal :-)
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