LANSING, Mich. (AP) -- The Michigan House has voted to require farms to comply with rules phased in over the next decade against confining and tethering some animals.

Some lawmakers say the measure passed 87-20 Wednesday could avert possible animal treatment ballot initiatives such as those passed in Arizona, California and Florida.

It's unclear if the proposal now headed to the Senate is strong enough to prevent animal rights advocates from pursuing such a measure in Michigan.

The measure would apply to pregnant pigs, veal calves and egg-laying hens. The rules would have exceptions but in most cases would allow the animals enough room to at least turn around freely.

Michigan and most other states have no laws addressing farm animals welfare.

Copyright 2009 The AP.

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