I'm studying Animal Behaviour and Welfare and I'm looking to end up training service dogs in the future.
I agree, that Puppy classes are the best place to socialise your puppy, it means that they are less likely to respond in a negative way to new things in the future. Its better to introduce it early then have to break the habit later on.
There is no problem with food rewards, regardless of what others have said, yu just need to know when it is appropriate to reward. it's a very quick way of training (along with the clicker method) of training new behaviours. The best analogy of explaining what I mean when using treats is the gambling idea. People get very addicted to gambling but they don't necessarily win everytime. Don't expect too much from your dog at once, and keep training sessions short otherwise yu will frazzle their brains! (I recommend around 3-5mins at most)
If your still dead against food rewards then another method is to combine clicker training with a toy reward. Use their favourite toy when a behaviour is is displayed and just be so happy and amazed with yur voice and actions.
Make sure initial training is undertaken in quiet environments with no distractions, and that your puppy is excercised beforehand. Otherwise yu may have a over excited pup and harder to keep them concentrated.
If using food rewards they will also not respond as well to treats when they have just been fed, so keep them a little hungry. Also it is important to make sure that their diet is altered slightly to accomodate extra food. Typical food used (apart from the bought packs) are things like broccoli, carrot, cheese and meat like hot dog. Cut them into very small pieces.
When training a behaviour chain (such as go to bed) start at the end. For example start by training the dog the command on the bed then gradually build on that. This always ends with the dog working towards something they know.
And finally, end training sessions on a high. If the dog hasn't grasped a new behaviour then end with something they know. It will make them more willing to want to train again.
Your lucky springer spaniels are very eager to learn and of course are a working dog, most popularly used in the force as sniffer dogs. This also makes them high energy dogs so make sure yu use up their energy with regular walks. (This will also keep them stimulated and reduces the risk of bad behaviours within the home due to frustration!)
Yu have a very pretty puppy there, and I'm extremely jealous!
Hope all goes well, let us know your progress. And if you want any more information, I have a mountain of info from college and personal experience!!!
Also see if you can pick up tips at London to Brighton from the Canine Partners demo!
Ellie x