Hi ChrisS
They can be a little destructive can't they
A couple of things I would check first are,
Diet, some foods can make them a bit hyper.
Exercise, how much is Smudge getting ?
Spaniels often need a job, Bea's is to collect socks, it's something she loves to do and will zoom up the stairs to find the socks
If all else fails Tuffie toys might be the way to go ( if not already tried )