> but I understood this was a common thing to do in Mals but maybe I am wrong
if it is a common thing then the 'problem' will become more and more common and eventually more dogs ears will not go up at all.
the
correct ear carriage needs to be bred for not created.
Friends and I imported a male puppy in our breed ans his were still inclined to tip at 6 months, but after providing him with chewing items (he was in Quarantine so we worried about giving bones/chews). they very quickly went up properly.
Now had we taped or messed about with his ears we would never have known if had we not they might not have stayed incorrect and passed the trait onto his offspring.
My advice to you would be to provide things for the pup to chew (possibly ear carriage being affected by teething of rear teeth), which will strengthen the jaw and ear muscles. Wait until after the teething stage is over (over 9 months) and see if they don't go up themselves. If not accept he isn't show or breeding quality.
We needed to be sure that what we had was natural and capable of being passed on.
Also from a breeders perspective if people tape pups ears the breeder won't know if the weakness is being passed on, as the ears may have gone up unaided anyway or equally may never have gone up.
Just an example to demonstrate how breeding for correct ears (or any trait) is important.
In the UK the Miniature pincher is a naturally prick eared breed, yet in USA and Canada where they crop the ears a natural eared Min Pin will often have floppy ears.