Mae maglau, neu atalyddion cebl fel y'u gelwir weithiau, yn achosi llawer iawn o ddioddefaint i anifeiliaid. Nid ydynt yn gwahaniaethu mewn unrhyw ffordd, ac maen nhw'n gallu niweidio rhywogaethau nad ydynt wedi'u bwriadu ar eu cyfer, megis dyfrgwn, cŵn a chathod.  Gall anifail sy'n cael ei ddal mewn magl wynebu poen a dioddefaint ofnadwy.
Snares, sometimes referred to as cable restraints, cause a great deal of suffering to animals and are indiscriminate as they can harm species they are not intended for such as otters, dogs and cats.  An animal caught in a snare can endure acute pain and suffering.