[nagdu] Picking up things from the ground

[Lisa]

Hello everyone!

Taylor does great guidework and we enjoy every day we spend with this 
playful and energetic dog. But there's a big problem that bothers me.
Taylor picks up things from the ground, mostly during our walks but 
sometimes also in harness, when it is something very "delicious". Of course 
I try to be very quick, correct him and/or take it out of his mouth but 
especially during walks, when he is on the long leash, that's not possible. 
So he gets the chance to swallow things like leftovers from a sandwich 
including its packaging, napkins or any other stuff that's attractive to 
him.
The consequence of this behaviour is that he throws up aproximately once a 
week. Then, together with his food and water, a piece of plastic or paper or 
any other not-digestable thing comes out again. Well, I'm glad that it does 
come out. But it's stressful anyway. For him, too, of course, no one likes 
being sick.
We saw the vet, so I am sure Taylor has no serious problems in his stomach. 
The only reason for throwing up seem to be the things that he picks up. I 
really do my best to monitor him but when he's sniffing around on a meadow 
and suddenly grabs and swallows something, what can I do?

I would be really interested in how you manage this problem--labradors are 
greedy creatures, so probably I'm not the only one who deals with it.

What kind of training could I do to avoid this?
Any ideas are greatly appreciated!

thanks and greetings from Germany
Lisa