I think it may be individual variation. Querk is a camel…he can hold it forever! All of our girls pee more frequently.....When Ivy was young, though she could hold it for a long time (and still can when she must).
I don't think I would worry too much about it. One thing that a long time breeder told me was that in his breed, that is prone to UTIs (not Basenjis), his theory is that it flushes the bladder better if a dog has its bladder full, and the voids a lot all at once, rather than just voiding frequently....I think the idea is that if there are crystals in the urinary tract they are more likely to be flushed out with a great volume of liquid. So, if the is correct that would make sense that Lenny, the dog that pees frequently, would be more likely to show signs of crystals, than Tayda who holds her urine and "flushes" more effectively?
I don't know if this is at all accurate...but his theory made sense to me. Also, some Bs are prone to crystal formation, but often don't develop a full blown UTI. There is something that some folks add to the water to change the PH of the urine, but I don't remember what...maybe someone else can help me out with that.