DS1 (2.7) is a model big brother to 5mo DS2 -- very loving and no signs of jealousy.
However... DS2 has started to be interested in all his brother's toys (apparently DS1's cars and trains are more interesting to chew than his own rattles). If DS1 sees this then the toy is whipped away with a firm "that's my toy!" and replaced with one of DS2's baby toys.
Part of me feels like it's unfair to expect DS1 to share his toys at this age. But then ideally they would share toys rather than me having to buy two of everything!
Any tips on how to handle this?