worried about pigeons in the terrace garden | Show off your garden | Commercial Hydroponics farming in India

Hi friends
I am Indu from Chennai, newly joined ,
My story goes like this,
I live in an apartment where along with three other friends took initiative to avail the horticultural departments urban gardening kit of 100 grow bags with seed and other accessories one month back. Now the plants are in 4 leaves stage and we are worried because pigeons started plucking the leaves and uprooting palak and other greens , we don't know what to do , the department people do not suggest shade net for this season and we are not sure of the shade percentage even if we go for shade nets, pls help ....