Yes, you can teach an old dog new tricks. However, it’s going to require a lot of patience and effort. The key is to start off slowly and gradually increase the difficulty of the tasks.

Start with something simple like sitting or shaking. Once your dog understands those commands then move on to more difficult things such as ‘stay’, ‘down’, and ‘roll over’. The key is not to try to do too much at once.
If you are considering starting off with tricks then it would be wise to clicker train your dog first. Clicker training is a great way to teach dogs commands and tricks. Using a clicker device whenever your dog does the correct behavior will help them to understand that this action makes you happy and that they want to do it again to make you happy again.
What you can’t teach an old dog to do?
You can’t teach an old dog how to walk on a leash, but you can help them learn. The first thing would be to get a harness and not a collar. This way if your dog pulls it will make it easier for you to control them without choking them.
Also, make sure to keep the leash loose and give praise whenever they take a step in the proper direction. Try not to pull them forward because you run the risk of hurting their hips and joints.
If your dog is a jumper then don’t encourage this behavior, even if they are doing it out of excitement. You can either teach them that when you say no it means to stop whatever they are doing or to try using a baby gate to keep them confined.

What is a Clicker for Training a dog?
A clicker is a small device that makes a clicking sound. It has long been popularly used in training dogs because it mimics the exact same noise as what a treat bag would make so the dog comes to associate the two together.
If you are just starting off then I recommend getting one that’s recommended for dogs. If you want to get one for both cats and dogs then I recommend this model .

How to Train a Dog with a Clicker?
The process of clicker training is simple. You want to wait until your dog does the behavior you want them to do, whether it be sitting or laying down. Then when they perform this action immediately mark this behavior with a click and give them a treat.
Repeat this process a few times then once they have the idea, stop giving treats. This way you will be able to use the clicker as a tool for rewarding good behavior instead of something that needs to become associated with food.
In conclusion, you can teach an old dog new tricks as long as you have patience and start off with something easy. If you are considering clicker training your dog I would highly recommend it. Clicker training is a great way to help your dog understand commands and tricks.