Hi. Ever since we switched from Feline Pine pellet litter to Dr Elsey's clumping litter our cat Bagheera has started high peeing. He always starts out squatting like before, but as he starts peeing he will raise his bum slowly until he is peeing right over the edge of the litterbox. Does anyone know why he might have started doing this? He is neutered. He is only 14 months old and has no problem doing acrobatic stunts around the house, so I don't think it's an arthritis sort of issue. Thanks in advance!