Or even if you're not on a budget...
These small bins, this one measures about 8 1/2 x 7 1/2 x 6 inches deep, are available at Wal-Mart, Staples, or any number of places including small stationary stores.
They make a great training aid for holding training birds such as pigeons or quail, for those that do not want to invest in, or do not believe in using electronically controlled spring traps with their dogs.. We call these small bins "Tracy Traps" in reference, and deferance, to the Master trainer George Tracy, of Summerhill Kennels in PA., where these traps were first seen in use.
The box pictured has seen it's share of use and is due for replacement, but all that needs to be added is a string (not necessary) and a brick or rock to hold the box doen over the pigeon (necessary).
These Tracy Traps are also great for planting birds in multiples. Many young dogs think that once one bird is gone, that it's time to move on. The use of another bird in one of these boxes alongside an e-trap, staunches the dog up and make training steady to wing easier, because the dog is forced to assume that another bird could be present. The benefits of this approach can be seen with most dogs virtually immediately... But, one of the greatest attributes is the excellent airflow around the bird, providing a powerful and natural scent cone.
Another benefit is the facts that most trainers believe that a dog cannot be finished without birds coming off the ground. These cheap boxes serve that purpose admirably, as would the more expensive Higgins traps. Further, the trap can be kicked over, as in kicking around under the dog's point as in flushing a bird, or tipped slowly, allowing the pigeon to walk out under the dog's nose, providing a real tease!
For the investment, these boxes are certainly worth every penny, and might just help with that dog that needs that last little bit of polish...