"how many times are we supposed to have a behaviouralist that charges £150 per app out to assess our dogs and give us advice on how to improve things?"
There we go. Severe aggression in a big dog is a life threatening condition- it's a very common reason for underdiagnosis and under treatment of physical conditions , and quite a common reason for euthanasia in its own right.
But behaviour problems are often not considered with the same seriousness and urgency as physical problems. The older dog was aggressive from 3 months but you got the behaviourist at 5 months. I bet you would've have left him with a broken leg for 2 months. Sedation and Xrays to assess a fracture and a Robert Jones bandage to stabilise it would be about £600. Fracture repair a couple of thousand or more. All the aftercare appointments and sedate/reXrays to check fracture healing- possibly another thousand. And that is if all goes well and you can unclip the lead in a few months and say that the dog is fixed and will need no further input. No surgery comes with a 100% guarantee and you can still end up minus thousands of pounds, with a dead dog.
Fixing behaviour problems requires a lot of money , frequent time consuming specialist input and has no guarantee of success in the short term and no guarantee that the problem and no guarantee that the problem won't recur long term.
Your options are, in no particular order
- continue exactly as you are, but accept the risk that if your dogs attack somebody walking on the road or public footpath, or anybody who innocently comes to your door, or if the nice quiet public forest has somebody else walking in it who gets attacked, you will be liable for damages. Plus your neighbours will hate you.
-2. Never, ever let your dogs off lead in public and only walk one dog per person at a time (as two labs can pull one adult over). Spend a small fortune securing your whole garden with an unjumpable fence if you want them off the lead. Shut them inside or chain them up if you're working on an unsecure part of your property.
- Spend a bigger fortune and all the effort on many, many behaviourist sessions and enact plan 2 while you wait months and possibly years, possibly forever, while you wait for plan 3 to work
- Euthanase.
I would think option 1 isn't very reasonable, and it drags unwilling people in. Having lived and worked rurally most of my life, and visiting friends who live rurally, running the gauntlet of "the house with the awful dogs" is horrible, whether you are on foot, bike or horse. Extra crap if you have a dog with you. Can't risk taking a child with you.
All other 3 options are reasonable. I'd be a bit pessimistic about option 3 in the older dog. Anything that is already aggressive at 14 weeks is usually a wrong 'un.