Pruning dog roses/ramblers

This is what you should do
Good afternoon @MAJ my friend I take that they are ramblers,which only flower once a year usually in June,and not climbers,Ramblers and Dog Roses are usually pruned after they have flowered and Hipped in late Summer ,it is easier to prune when it is leafless then you can see the canes and get the shape that you want.
Remove all dead, diseased, dying and weak shoots,Cut some of the old woody branches to the ground, retaining a maximum of six young, vigorous stems that can be secured to supports,Saw away any dead stumps at the base of the plant, where rain can collect and encourage rot,Shorten side shoots on the remaining branches and prune back the tips by one third to one half, to encourage branching,Give pruned plants a boost in the following spring by spreading a granular rose fertiliser over the soil and mulch them with a 5cm (2in) layer of garden compost or well rotted manure