We're getting a cockapoo next weekend, and I'm suddenly wondering if it's a potential issue that a section of our fence is 4' (the rest is taller). While researching breeds I remember seeing that goldendoodles and labradoodles sometimes jump fences. Is this a problem with cockapoos, too? The one we're planning to get is anticipated to be 25 pounds when full grown. Should we be looking to get the one that's anticipated to be 15 pounds instead?