No matter how young or old your Scottie happens to be, crate training him can come in handy for many reasons. First, your pup can be taught to see his crate in the same way as he would a den in the wild. Secondly, it gives you and your home a safe place for your dog when you have to leave to go out for a while. If you leave your pup loose and alone in the house while you are gone, he may become anxious and start chewing on things or making messes in the house.
How your Scottie responds to the crate will depend heavily on how he is introduced to it. Your goal is to teach him to see his crate as is most favorite place in the world. To help with this, you need to do everything in your power to make the entire training experience as positive and fun as possible.
The main goal of crate training has less to do with making your pup realize that, no matter what, he has to stay in it than working hard to make sure he sees his crate as his safe place or den. To do this, you should never use his crate as a form of punishment. At all times, you need to ensure every aspect of the training process is positive, this will make a significant difference in how quickly your pup learns to make the most of his crate.
Not only do you need to teach your pup to stay in his crate, but you will be training him to stay inside for increasingly longer periods of time. This will allow you to go work, go shopping, or take care of many other errands.
Having the right crate and having it set up comfortable are two of the most important parts of crate training. The crate should be big enough for your pup to stand up, lie down, and move around in. But, at the same time, you don't want a crate that is so big he starts using one corner of it for his personal bathroom.
At the same time, you need to make it comfortable. Your pup will love a crate pad or wall to wall carpeting, a nice plush bed, a water bottle, maybe a food dispenser, and of course, a few fun toys to play with.