Grr.. didn't see the second page, then by the time I edited my post it wouldn't let me post it, durn slow phone internet. . So here goes.
Anal glands can be effected by diet, usually but not always because of a lack in fiber. Vi used to have issues as a puppy but a vet I worked for suggested adding 1-2 capsules of otc fiber to her food every day and the problem vanished. Worth having another chat with the vet though before adding fiber to the diet.