I've spent many hours reading up on the tutorials and guides on ear posting on this forum, but am desperately in need of some advice specific to my puppy's situation. He was cropped at 12 weeks and has been in posts ever since (he is now 6.5 months). The right ear seems stronger and stands well, mostly vertical but he likes to wrinkle up his forehead and pull his ears inward very strongly. Last week we tried going without just a right post and it lasted 4 days before weakening and tipping over inwards, so it's back to two posts as usual.
The left ear seems to have a strong bend near the base that you can sort of feel "pop" out when you try to straighten it out. That ear can stand fine for a few hours when airing out before reposting, but seems to weaken quickly. He is able to hold both ears upright when he wants to, but if he's feeling lazy or focusing intently on something, the left ear is at a 45 degree angle with his head. Our posting method:
5/8 backer rod
Two layers of duct tape to reinforce the backer rod
Slather Torbot bonding cement on post
Backtape the post with Zonas tape
Insert post deep in ear and pull ear up as firmly as we can
3-4 pieces of Nexcare paper tape, starting at the bottom of the ear and circling our way up
1 long piece of Zonas tape over the paper tape near the base to help keep tape secure
I've made an album with some pictures I snapped this morning so you can see both the bent left ear and how his ears are tipping. Is the issue that his left, or maybe even both ears, have developed pockets? His food is fortified with Glucosamine and Chondroitin, so we haven't been feeding an additional supplement of it.
Really hoping someone can take a look at the pictures and explain what we're doing incorrectly and how we can fix it. Photos: https://photos.app.goo.gl/IXvMwGKgChnestmu1