Poor Henry (Miniature Schnauzer) and his Mom spent hours at the emergency clinic in Victoria just a few days ago. He unfortunately inhaled a spear grass seed and had to have it removed under anesthetic.
So, take care where you walk your beloved friend, as with this dry weather, these weeds are going to seed now and this is what presents such a danger.
The below mentioned link is a very thorough document on these plants and their dangers: