Can anyone offer any suggestions as to how to stop a particular behaviour?

Lottie (Dobe, so not a lot of coat for protection) every so often manages to go through a barbed wire fence when out on walks. After bathing and cleaning up the wounds I have a problem with Hattie (daughter of Lottie) in as much as she will NOT leave the wounds alone. So, they never heal, or at least take ages, and Lottie ends up with worse wounds than she started with and bald patches. I've tried putting an Ecofleece polar neck jumper on Lottie - Hattie just pushes her head under. I've muzzled Hattie, which makes her miserable.

Hattie also has an obsession with Lottie's ears. She chews them which is now making them a bit bald and the fur that is left is tinged brown (I assume from Hattie's saliva).

Any ideas?

Dogs will be dogs. :-)

Firstly the barbed wire fencing she goes through on walks, is it just in one particular field?  If so I would recall her to be close when in this field, call her well before she gets anywhere near the fence or get her attention by playing a game of ball, dummy retrieve, frisbee whatever you can get her interested in to keep her from going on the scent and passing through the barbed wire, quite simply just distract her.  If none of this is possible due to perhaps bad recall, then rather than risk her health I would lead her and run off her energy elsewhere or with ball play.

Re: Hattie getting to the wounds and her ears, the answer is if you are not in the room to supervise and distract Hattie from this behaviour then you need to keep them in seperate areas until her ears and wounds are healed, they may well enjoy each others company but it is more important to have Lottie recovered and not re-infected.  You need to keep using the word No! whenever Hattie looks as though she is going to have a good lick and reward her when she listens to you, but keep ontop of not allowing it to happen, on a night time get a dog gate up or keep Lottie with you until she heals.  Dogs will automatically lick a wound, you can only distract her from continuing. :-)

Hi Carrington - The barbed wire episodes aren't that often and I can't say it is a particular field. It's more the Hattie reaction that I want to stop! As it is, I am with them all day and Hattie is in a crate at night, but even in the same room during the day I'll suddenly look round and she's chewing her Mother's ears - I don't have eyes in the back of my head! It is only Lottie she is obsessed with, the other 4 could have gaping wounds and she wouldn't take any notice, must be Motherly love!

Vick.
Works for ear chewers as does TCP and any expensive(!) perfume. Not on the wounds of course but, if in the vacinity, it generally puts them off.